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Collection and analysis of gas samples from Wairakei Geyser Valley and Tauhara.
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Mapping surface alteration and the present-day thermal activity in Geyser Valley, Wairakei.
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Hydrothermal alteration and fluid-rock alteration in drillholes WK215 and WK207, Wairakei Geothermal Field, New Zealand.
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Description of thermal activity at Upper Geyser Valley, Wairakei, and associated hydrothermal alteration.